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58 lines
1.9 KiB
58 lines
1.9 KiB
//========= Copyright © 1996-2005, Valve Corporation, All rights reserved. ============// |
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// |
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// Purpose: |
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// |
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// $NoKeywords: $ |
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// |
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//=============================================================================// |
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// Initializers are a way to register your object to be initialized at startup time. |
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// They're a good way to have global variables without worrying about dependent |
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// constructors being called. They also make it so init code doesn't depend on the |
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// global objects it's initializing. |
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// To use initializers, just use REGISTER_INITIALIZER to register your global variable like this: |
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// class SomeClass {....} |
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// SomeClass *g_pSomeClassSingleton = NULL; |
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// REGISTER_INITIALIZER(SomeClass, &g_pSomeClassSingleton); |
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#ifndef INITIALIZER_H |
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#define INITIALIZER_H |
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typedef void* (*CreateInitializerObjectFn)(); |
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typedef void (*DeleteInitializerObjectFn)(void *ptr); |
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class Initializer |
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{ |
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public: |
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Initializer(void **pVar, CreateInitializerObjectFn createFn, DeleteInitializerObjectFn deleteFn); |
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// Allocates all the global objects. |
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static bool InitializeAllObjects(); |
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// Free all the global objects. |
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static void FreeAllObjects(); |
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private: |
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static Initializer *s_pInitializers; |
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void **m_pVar; |
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CreateInitializerObjectFn m_CreateFn; |
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DeleteInitializerObjectFn m_DeleteFn; |
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Initializer *m_pNext; |
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}; |
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#define REGISTER_INITIALIZER(className, varPointer) \ |
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static void* __Initializer__Create##className##Fn() {return new className;} \ |
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static void* __Initializer__Delete##className##Fn(void *ptr) {delete (className*)ptr;} \ |
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static Initializer g_Initializer_##className##(varPointer, __Initializer__Create##className##Fn, __Initializer__Delete##className##Fn); |
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#define REGISTER_FUNCTION_INITIALIZER(functionName) \ |
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static void* __Initializer__Create##functionName##Fn() { functionName(); return 0; } \ |
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static Initializer g_Initializer_##functionName##(0, __Initializer__Create##functionName##Fn, 0); |
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#endif |
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